JP2024546390A - High-frequency relay with excellent shielding performance - Google Patents

Abstract

A high frequency relay having excellent shielding performance, comprising a magnetic path section, a base section, and a movable contact section, the base section comprising one upper ground shield piece, one lower ground shield piece, at least two fixed contacts, and a plastic body in which the one lower ground shield piece and the at least two fixed contacts are integrated by injection molding, the fixed contacts have fixed contact exposed parts exposed on the surface of the plastic body, and the fixed contact exposed parts are provided with contacts for contacting a movable spring, the upper surfaces of the contacts being higher in the height direction than the upper surfaces of the lower ground shield piece, the upper ground shield piece being attached to the plastic body, being higher in the height direction than the upper surfaces of the contacts, and being grounded by the lower ground shield piece. The present invention is characterized in that a shielded space grounded above and below can be formed in a part corresponding to signal transmission inside the relay, thereby providing a good shielding effect, and being easy to realize, with a simple molding process, good processing precision, and high assembly efficiency and manufacturing efficiency.

Description

This invention claims priority to Chinese patent application having application number 202111665355.9, filed on December 30, 2021, and Chinese patent application having application number 202111665354.4, the entire disclosures of which are incorporated herein by reference.

The present invention relates to the technical field of relays, and in particular to high-frequency relays with excellent shielding performance.

A high-frequency relay is a relay for switching a high-frequency circuit, and since it is necessary to transmit a high-frequency signal, it is necessary to provide a shield structure inside or outside the relay. The high-frequency relay according to the prior art adopts an all-metal base method, in which the base is divided into two parts, an upper base and a lower base, both of which use metal materials, the leads are combined with the lower base and injection molded, the upper base and the lower base are welded to form the base part, the base part is also welded to the metal case and integrated, and further grounded by the ground pin of the case. The upper base and the lower base of such a high-frequency relay respectively form a ground shield, and the high-frequency signal is transmitted in the ground shield space, and the shielding effect is good, but the following problems exist. First, the molding process of the metal upper base, the metal lower base, and the metal case is complicated and difficult, so secondary processing is required. Secondly, the upper metal base and the lower metal base need to be further combined with the fixed contacts and injection molded after the processing is completed, so that there is a certain insulating ability between the fixed contacts and the metal base, and the insulating ability of the product is low, and the process of combining the base member alone and the fixed contacts and injection molding is difficult and has low dimensional accuracy. Thirdly, the metal base cannot directly mold the ground pin, so the metal base needs to be further grounded by welding with the metal case, and the fitting gap between the case and the base is small due to the restrictions of the process of injecting adhesive and molding the case and base, and the welding reliability between the metal case and the base is poor. Fourthly, the process flow is complicated and the manufacturing efficiency is low, and the manufacturing process requires the following manufacturing steps: molding the upper metal base and the lower metal base → combination injection molding of the lower metal base and the fixed contacts → welding assembly of the upper base and the lower base → assembly welding of the base and the case → injection of adhesive and molding. Fifthly, the adhesive strength between the metal and the molding adhesive is weak, and the sealing performance after reflow of the relay is easily significantly reduced. Another high frequency relay in the prior art adopts a method of plastic injection molding of the base, in which the fixed contact and plastic are combined to form the base by injection molding, and a ground shield tape is provided on one side of the base or above it to form a tape-shaped transmission structure. The process of molding the base of such a high frequency relay is simple, easy to realize, has good processing accuracy, and is low in material cost. In addition, compared with the conventional metal base, the plastic has good adhesion with the molding adhesive, and the sealing performance of the entire finished relay is good. However, the biggest problem with such a high frequency relay is as follows. The upper and lower bases do not form a shield space in the part corresponding to signal transmission inside the relay, so the shielding effect is poor and the requirements for use of the high frequency relay cannot be met, and it is also necessary to further improve the shielding effect by adding a metal shielding part outside the relay. In addition, when applied by a client, the upper and lower layers of the shielding structure can be formed to a certain extent only when the entire ground structure is provided on the PCB board and fitted.

The object of the present invention is to overcome the drawbacks of the prior art and provide a high-frequency relay with excellent shielding performance, characterized by a good shielding effect, a simple molding process, ease of implementation, good processing accuracy, and high assembly and manufacturing efficiency, by forming a shielded space grounded above and below the part inside the relay that corresponds to signal transmission.

The technical solution for solving the technical problem of the present invention is a high-frequency relay with excellent shielding performance, the high-frequency relay includes a magnetic path part, a base part, and a movable contact part, the magnetic path part and the movable contact part are respectively attached to the base part and linked to each other, the base part includes one upper ground shield piece, one lower ground shield piece, at least two fixed contacts, and a plastic body in which the one lower ground shield piece and the at least two fixed contacts are integrated by injection molding, the fixed contact has a fixed contact exposed part exposed on the surface of the plastic body, and the fixed contact exposed part is provided with a contact for contacting a movable spring, the upper surface of the contact is higher in the height direction than the upper surface of the lower ground shield piece, the upper ground shield piece is attached to the plastic body, is higher in the height direction than the upper surface of the contact, and is grounded by the lower ground shield piece, forming a shield space in the base part that can accommodate a bridge-type movable contact in the movable contact part, which is composed of a gap between the upper ground shield piece and the lower ground shield piece.

The plastic body is provided with a groove, the fixed contact exposed portion of the fixed contact is located at the bottom of the groove and exposed to the bottom surface of the groove of the plastic body, and the upper ground shield piece is attached to the groove of the plastic body.
The one lower ground shield piece and at least two fixed contacts are formed by pressing a single tape material, and the lower ground shield piece and the fixed contacts are combined with the plastic body by injection molding so that they are flush with each other, so that the lower ground shield piece and the fixed contacts are complementary in position in the same planar area.

The plastic body is a rectangular parallelepiped block, and the peripheral edge of the plastic body has side walls that extend upward and are surrounded by the side walls to form the groove, and the one lower ground shield piece and at least two fixed contacts are exposed on the same plane at the bottom surface of the groove of the plastic body.

In the groove of the plastic body, a plurality of support blocks are further provided in the cover area corresponding to the lower ground shield piece, which are integrally connected to the plastic body, and the plurality of support blocks each cover the area corresponding to the lower ground shield piece below, the upper ground shield piece is hung on the plurality of support blocks, and the upper surface of the side wall is higher than the upper surface of the upper ground shield piece.

The plurality of support blocks include first support blocks located at the four corners of the groove of the plastic body, and second support blocks located at the two long sides of the rectangle of the plastic body. The lower ground shield piece has welding pieces extending toward both sides, and the welding pieces are bent upward to expose the upper surface of the welding pieces to the upper surface of the second support block. The upper ground shield piece is fixed to the welding pieces by welding at the corresponding positions.

A notch is further provided in the long side wall corresponding to the rectangular shape of the plastic body at a position corresponding to the second support block, and the welded piece of the lower ground shield piece extends to the notch, and the height of the upper surface of the welded piece at the notch is the same as the height of the upper surface of the second support block, and a positioning protrusion is further integrally extended from the upper ground shield piece at a position corresponding to the notch of the plastic body, and the positioning protrusion of the upper ground shield piece is placed in the notch of the plastic body and fixed to the welded piece by welding.

The one lower ground shield piece and the at least two fixed contacts are each provided with a ground pin or lead pin extending outward from the side of the plastic body, and the ground pins of the lower ground shield piece include at least four ground pins distributed at the four rectangular corners of the plastic body.

The movable contact section includes at least one bridge-type movable contactor that is linked to the magnetic path section, and an elastic return member for returning the bridge-type movable contactor, the bridge-type movable contactor being provided in the gap between the upper ground shield piece and the lower ground shield piece, both ends of the bridge-type movable contactor respectively corresponding to the contact positions of two of the at least two fixed contactors, and the lower end of the elastic return member abuts against the lower ground shield piece, so that the upper end of the elastic return member presses the bridge-type movable contactor against the upper ground shield piece when returning.

The magnetic path section includes a coil section and an armature section that fit together, the coil section is attached to the plastic body, the armature section is supported by the upper ground shield piece, the upper ground shield piece is integrally connected to the armature section support seat by injection molding, and there are two armature section support seats, each located at the midpoint of the two long sides of the upper ground shield piece.

The at least two fixed contacts include two normally open end fixed contacts, two common end fixed contacts, and two normally closed end fixed contacts, each located on both sides of the rectangular longitudinal direction of the plastic body, where the two common end fixed contacts are located in the middle of the long side of the plastic body, and the two normally open end fixed contacts and the two normally closed end fixed contacts are located at both ends of the long side of the plastic body, respectively, the plurality of support blocks further includes a third support block that isolates the two fixed contacts on both sides of the longitudinal direction, the bridge-type movable contact is provided between the contact of the normally closed end fixed contact and the contact of the common end fixed contact or between the contact of the normally open end fixed contact and the contact of the common end fixed contact, and both ends of the bridge-type movable contact are beyond the range of the corresponding two contacts.

The movable contact portion includes two units that fit on both sides of the armature portion, and each unit includes two bridge-type movable contacts, one elastic return member, and an injection-molded member that integrates the two bridge-type movable contacts and the elastic return member by injection molding. The elastic return member and the injection-molded member form a cross-shaped structure, and the third support block also forms a corresponding cross-shaped groove so that it moves up and down in accordance with the cross-shaped structure formed by the elastic return member and the injection-molded member.

The coil section further includes a coil lead pin and a support pin molded integrally with the coil holder by injection molding, and the plastic body is further provided with a slot, the coil lead pin of the coil section is inserted into the slot of the plastic body, the support pin of the coil section is hooked onto the upper ground shield piece and fixed with adhesive, and the plastic body corresponding to the position where the adhesive between the support pin and the upper ground shield piece is aligned is further provided with an adhesive reservoir groove surrounded by the side walls of the groove, the adhesive separator, and the support block.

Compared to conventional techniques, the beneficial effects of the present invention are as follows:

In the present invention, the base part includes one upper ground shield piece, one lower ground shield piece, at least two fixed contacts, and a plastic body in which the one lower ground shield piece and the at least two fixed contacts are integrated by injection molding, and the fixed contact has a fixed contact exposed part exposed on the surface of the plastic body, and the fixed contact exposed part is provided with a contact for contacting a movable spring, and the upper surface of the contact is higher in the height direction than the upper surface of the lower ground shield piece, and the upper ground shield piece is attached to the plastic body, is higher in the height direction than the upper surface of the contact, and is grounded by the lower ground shield piece, thereby forming a shield space in the base part that can accommodate a bridge-type movable contact in the movable contact part, which is composed of a gap between the upper ground shield piece and the lower ground shield piece. According to such a structure of the present invention, a shield space that is grounded above and below the part corresponding to signal transmission inside the relay can be formed, which has the characteristics of good shielding effect, simple molding process, easy realization, good processing precision, high assembly efficiency and high manufacturing efficiency.

Furthermore, in the present invention, one lower ground shield piece and at least two fixed contacts are formed by pressing using one tape material, and the lower ground shield piece and the fixed contacts are combined with the plastic body by injection molding so that they are flush with each other, so that the lower ground shield piece and the fixed contacts are complementary in position in the same planar area. According to this structure of the present invention, the signal transmission section (i.e., the part including the contact in the fixed contact) is designed to be flush with the lower ground shield piece, and a gap is provided between the lower ground shield piece and the signal transmission section, thereby achieving impedance matching between the signal transmission section and the lower ground shield piece, and achieving transmission of high-frequency signals without distortion.

Furthermore, in the present invention, in the cover area corresponding to the lower ground shield piece in the groove of the plastic body, a plurality of support blocks are further provided which are integrally connected to the plastic body, and the plurality of support blocks cover the area corresponding to the lower lower ground shield piece, the upper ground shield piece is hung on the plurality of support blocks, and the upper surface of the side wall is higher than the upper surface of the upper ground shield piece. According to such a structure of the present invention, the plurality of support blocks contribute to improving the flatness of the upper ground shield piece after assembly, ensuring the consistency of the characteristic impedance and improving the transmission performance of high frequency signals, and also contribute to improving the horizontal flatness of the armature part and the iron core after the coil part is assembled, ensuring the reliability of the relay operation, and the side wall can be made higher than the upper ground shield piece to improve the sealing performance of the relay.

Furthermore, in the present invention, the lower end of the elastic return member abuts against the lower ground shield piece, and the upper end of the elastic return member presses the bridge-type movable contact against the upper ground shield piece when returning. With this structure of the present invention, the reaction mechanism of the movable contact part (i.e., the elastic return member) and the lower ground shield piece are always on, preventing the effects of irregular shapes on high frequency performance and improving the mechanical life and reliability of the relay.

The present invention will be described in more detail below with reference to the drawings and examples, but the high-frequency relay with excellent shielding performance of the present invention is not limited to the examples.

FIG. 1 is a schematic diagram of a three-dimensional structure of a first embodiment of the present invention (not including a case). FIG. 2 is an exploded schematic diagram of the three-dimensional structure of the first embodiment of the present invention. 1 is a structural cross-sectional view (not including a case) of a first embodiment of the present invention; 1 is a schematic diagram of a three-dimensional structure in which a base portion and a movable contact portion are combined according to a first embodiment of the present invention; FIG. 2 is a schematic diagram of a partially exploded view of a base portion and a movable contact portion according to the first embodiment of the present invention. FIG. 2 is a plan view of a combination of a base portion and a movable contact portion according to the first embodiment of the present invention. 7 is a cross-sectional view taken along line AA in FIG. 6. 1 is a schematic diagram of a three-dimensional structure in which a base portion (not including an upper ground shield piece) and a movable contact portion of the first embodiment of the present invention are fitted together. FIG. 9 is an enlarged view of part B in FIG. 8 . 1 is a schematic diagram of the three-dimensional structure of a base portion (not including an upper ground shield piece) according to a first embodiment of the present invention. 2 is a schematic diagram of an upper ground shield piece, a lower ground shield piece, and a fixed contact fitted together according to the first embodiment of the present invention; FIG. FIG. 12 is an enlarged view of part C in FIG. 1 is a schematic diagram of a tape material consisting of a lower ground shield piece and a fixed contact according to a first embodiment of the present invention. FIG. 11 is a schematic diagram of a three-dimensional structure of a movable contact portion according to a second embodiment of the present invention; FIG. FIG. 11 is a schematic diagram of the three-dimensional structure of the movable contact portion of the second embodiment of the present invention (excluding the plastic body). FIG. 11 is a schematic diagram of a tape material of a movable contact portion according to a second embodiment of the present invention. 11 is a schematic diagram of the structure of the movable contact portion of the second embodiment of the present invention after the tape material is injection molded. FIG. 13 is a schematic diagram of a structure in which a tape material of a movable contact portion according to a second embodiment of the present invention is injection molded and then an elastic return member is punched out. FIG. FIG. 11 is a schematic diagram of an external shape of a high-frequency relay according to a second embodiment of the present invention (not including a case). FIG. 11 is a cross-sectional view (not including a case) of a high-frequency relay according to a second embodiment of the present invention. FIG. 11 is an exploded schematic view of a three-dimensional structure of a high-frequency relay according to a second embodiment of the present invention. FIG. 6 is a schematic diagram of a part of a structure of a high-frequency relay according to a second embodiment of the present invention. FIG. 11 is an exploded schematic view of a part of a structure of a high-frequency relay according to a second embodiment of the present invention. 11 is a schematic diagram showing a state in which a base and a movable contact portion of a high-frequency relay according to a second embodiment of the present invention are fitted together. FIG. 13 is a schematic diagram of a three-dimensional structure of a movable contact portion according to a third embodiment of the present invention. FIG.

The exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments may be embodied in a variety of forms and are not limited to the embodiments described herein. In this specification, relative terms such as "above" and "below" are used to describe the relative relationship between one assembly and another assembly shown in the drawings, but these terms are used merely for convenience and are based on the exemplary orientation shown in the drawings. If the device shown in the drawings is inverted so that it is upside down, it will be understood that the assembly located "above" will become the assembly located "below". Other relative terms such as "top", "bottom" and the like are intended to have similar meanings. When a structure is located "above" another structure, it may mean that the structure is integrally formed on the other structure, that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure by another structure.

The terms "a", "one", "the", "said" are used to indicate the presence of one or more elements/components/etc.; the terms "comprise" and "have" are used to mean an open inclusion and mean elements/components/etc. that may be present in addition to the listed elements/components/etc.; the terms "first", "second", etc. are used as indicative only and do not limit the quantity of their subject matter.

Example 1
1 to 13, the high frequency relay with excellent shielding performance according to the present invention includes a magnetic path section 1, a base section 2, and a movable contact section 3, the magnetic path section 1 and the movable contact section 3 are attached to the base section 2 and are interlocked with each other, the base section 2 includes one upper ground shield piece 4, one lower ground shield piece 5, at least two fixed contacts 6, and a plastic body 7 in which the one lower ground shield piece 5 and the at least two fixed contacts 6 are integrated by injection molding. The fixed contact 6 has a fixed contact exposed section 61 exposed on the surface of the plastic body 7, and a contact 62 for contacting a movable spring is provided on the fixed contact exposed section 61, and the upper surface of the contact 62 is higher in the height direction than the upper surface of the lower ground shield piece 5. The upper ground shield piece 4 is attached to the plastic body 7, is higher in the height direction than the upper surface of the contact 62, and is grounded by the lower ground shield piece 5, thereby forming a shielded space 30 in the base portion 2, which is composed of the gap between the upper ground shield piece 4 and the lower ground shield piece 5 and is capable of accommodating a bridge-type movable contactor 31 in the movable contact portion 3 (see Figure 3).

In this embodiment, the plastic body 7 is provided with a groove 71, the fixed contact exposed portion 61 of the fixed contact 6 is located at the bottom of the groove 71 and is exposed to the bottom surface of the groove 71 of the plastic body 7, and the upper ground shield piece 4 is attached to the groove 71 of the plastic body 7.

In this embodiment, as shown in FIG. 13, the one lower ground shield piece 5 and at least two fixed contacts 6 are formed by pressing using one tape material, and the lower ground shield piece 5 and the fixed contacts 6 are combined with the plastic body 7 by injection molding so that they are flush with each other (as shown in FIG. 10), so that the lower ground shield piece and the fixed contacts are complementary in position in the same planar area.

In this embodiment, the plastic body 7 is a block body having a rectangular parallelepiped shape, and the peripheral edge of the plastic body 7 has an upwardly extending side wall 72, and the groove 71 is formed by being surrounded by the side wall 72, and the one lower ground shield piece 5 and at least two fixed contacts 6 are exposed on the same plane at the bottom surface of the groove 71 of the plastic body 7.

In this embodiment, in the groove 71 of the plastic body 7, a plurality of support blocks 73 are further provided in the cover area corresponding to the lower ground shield piece 5, which are integrally connected to the plastic body 7, and the plurality of support blocks 73 each cover the corresponding area of the lower ground shield piece 5 below, the upper ground shield piece 4 is hung on the plurality of support blocks 73, and the upper surface of the side wall 72 is higher than the upper surface of the upper ground shield piece 4.

In this embodiment, the plurality of support blocks 73 include first support blocks 731 located at the four corners of the groove 71 of the plastic body 7, and second support blocks 732 located at the two long sides of the rectangle of the plastic body. The lower ground shield piece 5 has welding pieces 51 extending toward both sides, and the welding pieces 51 are bent upward to expose the upper surface of the welding pieces 51 to the upper surface of the second support block 732. The upper ground shield piece 4 is fixed to the welding pieces 51 by welding at the corresponding positions and is grounded via the ground shield piece 5.

In this embodiment, a notch 74 is further provided at a position corresponding to the second support block 732 on the long side wall corresponding to the rectangular shape of the plastic body 7, the welding piece 51 of the lower ground shield piece 5 extends to the notch 74, and the height of the upper surface of the welding piece 51 at the notch 74 is made to coincide with the height of the upper surface of the second support block 732, and a positioning protrusion 41 is further integrally extended at a position corresponding to the notch of the plastic body 7 on the upper ground shield piece 4, and the positioning protrusion 41 of the upper ground shield piece 4 is placed in the notch 74 of the plastic body 7 and fixed to the welding piece 51 by welding.

In this embodiment, the one lower ground shield piece 5 and the at least two fixed contacts 6 are each provided with a ground pin or lead pin extending outward from the side of the plastic body, i.e., the lower ground shield piece 5 is provided with a ground pin 52, and the fixed contacts 6 are provided with a lead pin 63. Here, the ground pins 52 of the lower ground shield piece 5 include at least four ground pins 52 distributed at the four corners of the rectangle of the plastic body 7.

In this embodiment, the movable contact portion 3 includes at least one bridge-type movable contactor 31 that is linked to the magnetic path portion 1, and an elastic return member 32 for returning the bridge-type movable contactor. The bridge-type movable contactor 31 is provided in the gap between the upper ground shield piece 4 and the lower ground shield piece 5, and both ends of the bridge-type movable contactor 31 correspond to the contact positions of two of the at least two fixed contactors 6, respectively, and the lower end of the elastic return member 32 abuts against the lower ground shield piece 5, so that the upper end of the elastic return member 32 presses the bridge-type movable contactor 31 against the upper ground shield piece 4 when returning.

In this embodiment, the magnetic path section 1 includes a coil section 11 and an armature section 12 that fit together, the coil section 11 is attached to the plastic body 7, and the armature section 12 is supported by the upper ground shield piece 4. The upper ground shield piece 4 is integrally connected to an armature section support seat 42 made of plastic material by injection molding, and there are two armature section support seats 42, each located at the midpoint of the two long sides of the upper ground shield piece 4.

In this embodiment, the at least two fixed contacts include two normally open end fixed contacts 64, two common end fixed contacts 65, and two normally closed end fixed contacts 66, which are located on both sides of the rectangular longitudinal direction of the plastic body. Here, the two common end fixed contacts 65 are located in the middle of the long side of the plastic body 7, and the two normally open end fixed contacts 64 and the two normally closed end fixed contacts 66 are located at both ends of the long side of the plastic body. The multiple support blocks 73 further include a third support block 733 that isolates the two fixed contacts on both sides of the longitudinal direction. The bridge-type movable contact 31 is provided between the contact of the normally closed end fixed contact 66 and the contact of the common end fixed contact 65 or between the contact of the normally open end fixed contact 64 and the contact of the common end fixed contact 65, and both ends of the bridge-type movable contact 31 exceed the range of the corresponding two contacts.

In this embodiment, the movable contact portion 3 includes two units that fit on both sides of the armature portion 12, and each unit includes two bridge-type movable contacts 31, one elastic return member 32, and an injection molded member 33 in which the two bridge-type movable contacts and one elastic return member are integrated by injection molding. The elastic return member 32 and the injection molded member 33 form a cross-shaped structure, and the third support block 733 also forms a corresponding cross-shaped groove so that it moves up and down in accordance with the cross-shaped structure formed by the elastic return member 32 and the injection molded member 33. The upper ground shield piece 4 is further provided with a through hole 43 that moves the cross-shaped structure formed by the elastic return member 32 and the injection molded member 33 up and down.

In this embodiment, the coil part further includes a coil lead pin 13 and a support pin 15 molded integrally with the coil holder 14 by injection molding, and the plastic body 7 is further provided with a slot 75, the coil lead pin 13 of the coil part 11 is inserted into the slot 75 of the plastic body 7, and the support pin 15 of the coil part 11 is hooked onto the upper ground shield piece 4 and fixed with adhesive. The plastic body 7 corresponding to the position where the adhesive between the support pin 15 and the upper ground shield piece 4 is aligned is further provided with an adhesive reservoir groove 76 surrounded by the side wall 72 of the groove, an adhesive separator 77, and a support block (i.e., the first support block 731, the second support block 732).

According to the high-frequency relay having excellent shielding performance of the present invention, the base portion 2 includes one upper ground shield piece 4, one lower ground shield piece 5, at least two fixed contacts 6, and a plastic body 7 in which the one lower ground shield piece and the at least two fixed contacts are integrated by injection molding. The fixed contact piece 6 has a fixed contact exposed portion 61 exposed on the surface of the plastic body 7, and the fixed contact exposed portion 61 is provided with a contact 62 for contacting a movable spring, and the upper surface of the contact 62 is higher in the height direction than the upper surface of the lower ground shield piece 5. The upper ground shield piece 4 is attached to the plastic body 7, is higher in the height direction than the upper surface of the contact 62, and is grounded by the lower ground shield piece 5, thereby forming a shield space 30 in the base portion 2 that can accommodate a bridge-type movable contact piece 31 in the movable contact portion, which is composed of a gap between the upper ground shield piece 4 and the lower ground shield piece 5. This structure of the present invention allows for the formation of a shielded space that is grounded above and below the part of the relay that corresponds to signal transmission (as shown by route D in Figure 3), which provides a good shielding effect, a simple molding process, is easy to implement, has good processing accuracy, and is highly efficient in assembly and manufacturing.

According to the high-frequency relay with excellent shielding performance of the present invention, one lower ground shield piece 5 and at least two fixed contacts 6 are formed by pressing using one tape material, and the lower ground shield piece 5 and the fixed contacts 6 are combined with the plastic body 7 by injection molding so that they are flush with each other, so that the lower ground shield piece 5 and the fixed contacts 6 are complementary in position in the same planar area. According to this structure of the present invention, the fixed contact of the signal transmission part (i.e., the part including the contact point in the fixed contact) is designed to be flush with the lower ground shield piece, and a gap is provided between the lower ground shield piece and the signal transmission part, thereby achieving impedance matching between the signal transmission part and the lower ground shield piece, and achieving transmission of high-frequency signals without distortion.

According to the high-frequency relay with excellent shielding performance of the present invention, in the groove 71 of the plastic body 7, a cover area corresponding to the lower ground shield piece 5 is further provided with a plurality of support blocks 73 integrally connected to the plastic body 7, and the plurality of support blocks 73 cover the corresponding area of the lower ground shield piece 5, respectively, and the upper ground shield piece 4 is hung on the plurality of support blocks 73, and the upper surface of the side wall 72 is higher than the upper surface of the upper ground shield piece 4. According to such a structure of the present invention, the plurality of support blocks contribute to improving the flatness of the upper ground shield piece after assembly, ensure the consistency of the characteristic impedance, improve the transmission performance of the high-frequency signal, and contribute to improving the horizontal flatness of the armature part and the iron core after the coil part is assembled, ensure the reliability of the relay operation, and make the side wall higher than the upper ground shield piece to improve the sealing performance of the relay.

In the high-frequency relay with excellent shielding performance according to the present invention, the lower end of the elastic return member 32 abuts against the lower ground shield piece 5, and the upper end of the elastic return member 32 presses the bridge-type movable contact 31 against the upper ground shield piece 4 during return. With this structure according to the present invention, the reaction mechanism of the movable contact part (i.e., the elastic return member) and the lower ground shield piece are always on, which avoids the effects of irregular shapes on high-frequency performance and improves the mechanical life and reliability of the relay.

A high-frequency relay is a relay for switching a high-frequency circuit. A high-frequency relay in the prior art usually includes a magnetic path portion, a base portion, and a movable contact portion. The fixed spring portion of such a high-frequency relay is integrated in a base to form the base portion together. The magnetic path portion is attached to the upper surface of the base portion. The armature in the magnetic path portion has a seesaw structure and is fitted into the movable contact portion built into the base. The base is provided with a groove. The movable contact portion includes a combination of movable springs and a reaction spring. The combination of movable springs is attached to the base via the reaction spring. One end of the armature operates to lower the combination of movable springs. When the armature is pushed down, the combination of the movable springs moves the bridge-type movable contact in the combination of the movable springs downward in the groove against the elastic force of the reaction spring, and when both ends of the bridge-type movable contact are brought into contact with the contacts of the two fixed contacts, the circuit connected by the two fixed contacts is made conductive; when one end of the armature moves upward, the combination of the movable springs moves the bridge-type movable contact in the combination of the movable springs upward in the groove under the elastic force of the reaction spring, and when both ends of the bridge-type movable contact are separated from the contacts of the two fixed contacts, the circuit connected by the two fixed contacts is interrupted. In the conventional technology, the combination of the movable springs and the reaction spring of the movable contact part are two separate parts, which results in a large number of parts in the movable contact part, poor assembly stability, low material utilization rate, and high manufacturing costs.

The present invention further provides a movable contact for transmitting high-frequency signals and a high-frequency relay thereof, which has the characteristics of having a small number of parts, good structural strength, good assembly stability, high material utilization rate, and low manufacturing costs.

The technical solution that the present invention uses to solve the technical problem is a movable contact for transmitting high-frequency signals, which includes a first sheet body, a second sheet body, and a plastic body formed by injection molding to cover the middle parts of the first sheet body and the second sheet body without connecting them to each other, and which forms an overall structure, and the first sheet body is provided as a bridge-type movable contact of the movable contact body, and the second sheet body is bent so that both ends have downward protrusions to form an elastic return member of the movable contact body.

The first and second sheets are pressed into the same strip of material, and both ends of the first sheet are pressed to form the bridge-type movable contact, while the second sheet is pressed and folded so that both ends protrude downward to form the elastic return member.

The plastic body has an elongated shape and is distributed perpendicular to the first sheet body on the same horizontal plane.

The top surface of the plastic body has a protrusion that fits into the armature of the relay.

The tape material is rectangular, and the first sheet body and the second sheet body are arranged in parallel in the same direction along the longitudinal direction or width direction of the tape material.

There are two first sheet bodies and one second sheet body, and in the parallel arrangement, the one second sheet body is located in the middle, the two first sheet bodies are located on both sides of the second sheet body, and the one second sheet body and the plastic body form a cross-shaped structure.

There is one first sheet body and two second sheet bodies, and in the parallel arrangement, the one first sheet body is located in the middle, the two second sheet bodies are located on both sides of the first sheet body, and the two second sheet bodies and the plastic body form an L-shaped structure.

The second sheet body is frame-shaped, and the plastic body is filled into a portion of the intermediate through-hole of the frame-shaped second sheet body.

A high-frequency relay including a magnetic path section, a base section, and the above-mentioned movable contact section, the magnetic path section being attached to the upper surface of the base section, the base section being provided with a groove for incorporating the movable contact section, the movable contact section being incorporated into the groove by the elastic properties of an elastic return member, and the bridge-type movable contact of the movable contact section being restricted to be positioned between the contact of the fixed spring of the base section and the upper stopper piece, and the armature section of the magnetic path section being fitted into the plastic body of the movable contact section.

A number of support blocks are provided in the groove of the base portion, and the support blocks form a cross-shaped groove or an L-shaped groove into which the plastic body of the movable contact portion and the second sheet body are fitted.

The magnetic path section further includes a coil section that fits into the armature section, the coil section is attached to the base section, and the armature section fits into the coil section in a seesaw shape.

Compared to conventional techniques, the beneficial effects of the present invention are as follows:

In the present invention, the first sheet body, the second sheet body, and a plastic body formed by injection molding to cover the middle parts of the first sheet body and the second sheet body without connecting them to each other to form the entire structure constitute a movable contact part for transmitting high frequency signals, and the first sheet body is provided as a bridge-type movable contact of the movable contact part, and the second sheet body is folded so that both ends have downward protrusions to constitute an elastic return member of the movable contact part. Such a structure of the present invention has the characteristics of fewer parts, good structural strength, good assembly stability, high material utilization rate, and low manufacturing costs.

Example 2
14 to 18, the movable contact portion for transmitting high frequency signals according to the present invention includes a first sheet body 11A and a second sheet body 12A formed by pressing into the same tape material 1A, and a plastic body 2A formed by injection molding to cover the middle portions of the first sheet body 11A and the second sheet body 12A without connecting them to each other to form the entire structure, wherein both ends of the first sheet body 11A are pressed to form a bridge-type movable contactor 4A of the movable contact portion 3A, and the second sheet body 12A is pressed to bend both ends to have downward protrusions 51A to form an elastic return member 5A of the movable contact portion 3A.

In this embodiment, the plastic body 2A has an elongated shape and is distributed perpendicular to the first sheet body 11A on the same horizontal plane.

In this embodiment, the upper surface of the plastic body 2A is provided with a protrusion 21A for fitting into the armature portion of the relay.

In this embodiment, the tape material 1A is rectangular, and the first sheet body 11A and the second sheet body 12A are arranged in parallel in the same direction along the longitudinal direction of the rectangular tape material.

In this embodiment, there are two first sheet bodies 11A and one second sheet body 12A. In the parallel arrangement, the one second sheet body 12A is located in the middle, and the two first sheet bodies 11A are located on both sides of the second sheet body 12A, and the one second sheet body 12A and the plastic body 2A form a cross-shaped structure. After completing the pressing, the movable contact portion 3A includes two bridge-type movable contacts 4A, one elastic return member 5A, and a plastic body 2A in which the two bridge-type movable contacts 4A and one elastic return member 5A are injection molded into the entire structure, and the plastic body 2A is provided with two protrusions 21A for fitting into the armature part of the relay.

In this embodiment, the second sheet body 12A is frame-shaped, and the plastic body 2A is filled into a portion of the frame-shaped intermediate through-hole 121A of the second sheet body 12A.

14 to 24, the high frequency relay according to the present invention includes a magnetic path portion 6A, a base portion 7A, and the above-mentioned movable contact portion 3A. The base portion 7A includes a base 71A, a fixed contactor 72A including a fixed contact 721A, and an upper stopper piece 73A. Here, the fixed contact 72A is fitted to the base 71A by injection molding, the magnetic path portion 6A is attached to the upper surface of the base portion 7A, and the base portion 7A is provided with a groove 711A for fitting the movable contact portion 3A. That is, the base 71A is provided with a groove 711A for fitting the movable contact portion 3A, and the movable contact portion 3A is fitted into the groove 711A by the elastic characteristics of the elastic return member 5A. The bridge-type movable contact 4A of the movable contact portion 3A is restricted to be located between the contact 721A of the fixed spring of the base portion and the upper stopper piece 73A, and the armature portion 61A of the magnetic path portion 6A is fitted into the plastic body 2A of the movable contact portion 3A.

In this embodiment, a plurality of support blocks 712A are provided in the groove 711A of the base portion 7A, that is, a plurality of support blocks 712A are provided in the groove 711A of the base 71A, and the plurality of support blocks 712A form a cross-shaped groove 713A into which the plastic body 2A and the elastic return member 5A of the movable contact portion 3A are inserted.

In this embodiment, the upper stopper piece 73A is an integrated ground shield piece, and is attached within the groove 711A of the base 71A. The upper stopper piece 73A is provided with a cross-shaped escape hole 731A, which is for the plastic body 2A and elastic return member 5A of the movable contact portion 3A to escape from vertical movement.

In this embodiment, the magnetic path portion 6A further includes a coil portion 62A that fits into the armature portion 61A, and the coil portion 62A is attached to the base portion 7A, and the armature portion 61A has a seesaw shape and fits into the coil portion 62A.

The movable contact for transmitting high frequency signals and its high frequency relay according to the present invention uses a first sheet body 11A and a second sheet body 12A formed by pressing into the same tape material 1A, and a plastic body 2A formed by injection molding to cover the middle parts of the first sheet body 11A and the second sheet body 12A without connecting them to each other to form an overall structure, forming a movable contact part 3A for transmitting high frequency signals. In addition, both ends of the first sheet body 11A are pressed to form a bridge-type movable contactor 4A of the movable contact part 3A. The second sheet body 12A is pressed to bend both ends to have downward protrusions 51A to form an elastic return member 5A of the movable contact part 3A. According to this structure of the present invention, the movable contact (i.e., the bridge-type movable contact 4A) and the repulsive mechanism (i.e., the elastic return member 5A) are provided on the same tape material, the movable contact and the repulsive mechanism have the same direction, and waste material from the movable contact is utilized to punch out the reaction spring structure, which is combined with the movable contact and injection molded as a single unit, so that the number of parts to be assembled can be reduced and the utilization rate of materials can be improved. Here, since the direction of the movable contact and the repulsive mechanism are the same, the repulsive mechanism after punching out the tape material and injection molding is flat, and the space on both sides of the injection molded part (i.e., the plastic body 2A) is utilized to bend into a repulsive mechanism having a repulsive force, so that the present invention has the characteristics of having fewer parts, good structural strength, good assembly stability, high material utilization rate, and low manufacturing costs.

Example 3
25, the difference between the movable contact for transmitting a high frequency signal and the high frequency relay thereof according to the present invention and the embodiment 2 is that in the present embodiment, the first sheet body 11A is one, the second sheet body 12A is two, and in the parallel arrangement, the one first sheet body 11A is located in the middle, and the two second sheet bodies 12A are located on both sides of the first sheet body 11A, and the two second sheet bodies 12A and the plastic body 2A form an "E"-shaped structure. After completing the pressing, the movable contact part 3A includes one bridge-type movable contactor 4A, two elastic return members 5A, and a plastic body 2A in which the one bridge-type movable contactor 4A and the two elastic return members 5A are injection-molded into the entire structure, and the plastic body 2A is provided with two protrusions 21A for fitting into the armature part of the relay.

It should be understood that the present invention is not limited in its application to the detailed construction and arrangement of the components proposed herein. The present invention may have other embodiments and may be realized and carried out in various ways. Such variations and modifications are within the scope of the present invention. The present invention as disclosed and limited herein extends to all alternative combinations of two or more distinct features mentioned or shown in this specification and/or the drawings. All these different combinations constitute multiple alternative aspects of the present invention. The embodiments described herein describe the most preferred modes known for implementing the present invention and enable those skilled in the art to utilize the present invention.

Claims (13)

A high-frequency relay including a magnetic path portion, a base portion, and a movable contact portion, the magnetic path portion and the movable contact portion being attached to the base portion and interlocking with each other,
A high-frequency relay with excellent shielding performance, characterized in that the base portion includes one upper ground shield piece, one lower ground shield piece, at least two fixed contacts, and a plastic body in which the one lower ground shield piece and the at least two fixed contacts are integrated by injection molding, the fixed contact having a fixed contact exposed portion exposed on the surface of the plastic body, and the fixed contact exposed portion is provided with a contact for contacting a movable spring, the upper surface of the contact being higher in the height direction than the upper surface of the lower ground shield piece, the upper ground shield piece being attached to the plastic body, being higher in the height direction than the upper surfaces of the contacts, and being grounded by the lower ground shield piece, thereby forming a shielded space in the base portion that is composed of a gap between the upper ground shield piece and the lower ground shield piece and is capable of accommodating a bridge-type movable contact in the movable contact portion. 2. The high frequency relay with excellent shielding performance as claimed in claim 1, characterized in that the plastic body is provided with a groove, the fixed contact exposed portion of the fixed contact is located at the bottom of the groove and exposed to the bottom surface of the groove of the plastic body, and the upper ground shield piece is attached to the groove of the plastic body. 3. A high-frequency relay with excellent shielding performance as described in claim 1 or 2, characterized in that the one lower ground shield piece and at least two fixed contacts are formed by pressing using a single tape material, and the lower ground shield piece and the fixed contacts are combined with the plastic body by injection molding so that they are flush with each other, so that the lower ground shield piece and the fixed contacts are complementary in position in the same planar area. 4. The high frequency relay with excellent shielding performance according to claim 3, characterized in that the plastic body is a block body having a rectangular parallelepiped shape, the peripheral edge of the plastic body has side walls that protrude upward and are surrounded by the side walls to form the groove, and the one lower ground shield piece and the at least two fixed contacts are exposed on the same plane at a bottom surface of the groove of the plastic body. The high frequency relay with excellent shielding performance as claimed in claim 4, characterized in that in the groove of the plastic body, a cover area corresponding to the lower ground shield piece is further provided with a plurality of support blocks integrally connected to the plastic body, the plurality of support blocks respectively cover the area corresponding to the lower ground shield piece below, the upper ground shield piece is hung on the plurality of support blocks, and the upper surface of the side wall is higher than the upper surface of the upper ground shield piece. The high frequency relay with excellent shielding performance as claimed in claim 5, characterized in that the plurality of support blocks include first support blocks respectively positioned at four corners of the groove of the plastic body and second support blocks respectively positioned at two long sides of the rectangle of the plastic body, the lower ground shield piece has welding pieces extending toward both sides, the welding pieces are bent upward to expose the upper surface of the welding pieces on the upper surface of the second support block, and the upper ground shield piece is fixed to the welding pieces at the corresponding positions by welding. A high-frequency relay with excellent shielding performance as described in claim 6, characterized in that a notch is further provided at a position corresponding to the second support block on a long side wall corresponding to the rectangular shape of the plastic body, the welding piece of the lower ground shield piece extends to the notch, and the height of the upper surface of the welding piece at the notch is the same as the height of the upper surface of the second support block, a positioning protrusion is further integrally extended on the upper ground shield piece at a position corresponding to the notch of the plastic body, and the positioning protrusion of the upper ground shield piece is positioned in the notch of the plastic body and fixed to the welding piece by welding. The high frequency relay with excellent shielding performance as described in claim 4, characterized in that the one lower ground shield piece and the at least two fixed contacts are each provided with a ground pin or lead pin extending outward from a side surface of the plastic body, and the ground pins of the lower ground shield piece include at least four ground pins distributed at four rectangular corners of the plastic body. The high-frequency relay with excellent shielding performance as described in claim 4, characterized in that the movable contact portion includes at least one bridge-type movable contactor linked to the magnetic path portion and an elastic return member for returning the bridge-type movable contactor, the bridge-type movable contactor being provided in the gap between the upper ground shield piece and the lower ground shield piece, both ends of the bridge-type movable contactor respectively corresponding to contact positions of two of the at least two fixed contacts, and the lower end of the elastic return member abuts against the lower ground shield piece, so that the upper end of the elastic return member presses the bridge-type movable contactor against the upper ground shield piece during return. 5. A high-frequency relay with excellent shielding performance as claimed in claim 4, characterized in that the magnetic path portion includes a coil portion and an armature portion which fit together, the coil portion being attached to the plastic body, the armature portion being supported by the upper ground shield piece, the upper ground shield piece being integrally connected to the armature portion support seat by injection molding, and there are two armature portion support seats, each located at a midpoint between two long sides of the upper ground shield piece. 7. The high frequency relay with excellent shielding performance according to claim 6, characterized in that the at least two fixed contacts include two normally open end fixed contacts, two common end fixed contacts and two normally closed end fixed contacts located on both sides of the rectangular longitudinal direction of the plastic body, the two common end fixed contacts are located in the middle of the long sides of the plastic body, the two normally open end fixed contacts and the two normally closed end fixed contacts are located on both ends of the long sides of the plastic body, the multiple support blocks further include a third support block isolating the two fixed contacts on both sides in the longitudinal direction, the bridge-type movable contact is provided between the contacts of the normally closed end fixed contacts and the contacts of the common end fixed contact or between the contacts of the normally open end fixed contacts and the contacts of the common end fixed contact, and both ends of the bridge-type movable contact exceed the range of the corresponding two contacts. 10. The high frequency relay with excellent shielding performance according to claim 9, wherein the movable contact portion includes two single bodies fitted to both sides of the armature portion, each single body including two bridge-type movable contacts, one elastic return member, and an injection molded member obtained by integrating the two bridge-type movable contacts and the one elastic return member through injection molding, the elastic return member and the injection molded member forming a cross-shaped structure, and the third support block is also formed surrounding a corresponding cross-shaped groove so as to move up and down in accordance with the cross-shaped structure formed by the elastic return member and the injection molded member. 10. The high frequency relay with excellent shielding performance as claimed in claim 9, wherein the coil portion further includes a coil lead pin and a support pin integrally formed with the coil holder by injection molding, the plastic body further includes a slot, the coil lead pin of the coil portion is inserted into the slot of the plastic body, the support pin of the coil portion is hooked on the upper ground shield piece and fixed with adhesive, and the plastic body further includes an adhesive reservoir groove surrounded by a side wall of the groove, an adhesive separator and a support block at a position where the adhesive between the support pin and the upper ground shield piece is aligned.

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